Fistan
Piston motsi ne mai maimaitawa a jikin silinda na injin mota. Za'a iya raba tsarin asali na piston zuwa saman, kai da siket. saman piston shine babban ɓangaren ɗakin konewa, kuma siffarsa yana da alaƙa da zaɓin ɗakin ɗakin konewa. Injin mai galibi suna amfani da fistan saman lebur, wanda ke da fa'idar ƙaramin yanki mai ɗaukar zafi. saman piston ingin dizal sau da yawa yana da ramuka iri-iri, takamaiman siffarsa, matsayi da girmansa dole ne ya kasance tare da haɗin injin dizal da buƙatun konewa.
saman fistan wani bangare ne na dakin konewa, don haka galibi ana yin shi da siffofi daban-daban, kuma piston injin mai a mafi yawan lokuta yana amfani da saman lebur ne ko kuma sama mai dunkulewa, ta yadda dakin konewar ya yi dunkule, wurin da ake zubar da zafi kadan ne. , kuma tsarin masana'antu yana da sauƙi. Ana amfani da pistons kai tsaye a cikin injunan gas guda biyu. Fistan fistan injunan diesel galibi ana yin su ne da ramuka daban-daban.
Shugaban piston shine sashin da ke sama da wurin zama na fistan, kuma ana shigar da kan piston tare da zoben fistan don hana yawan zafin jiki da iskar gas mai ƙarfi daga shiga cikin crankcase da hana mai shiga ɗakin konewa; Mafi yawan zafin da saman fistan ke sha kuma ana watsa shi zuwa silinda ta kan piston, sannan a juye shi ta wurin sanyaya.
Ana sarrafa shugaban piston tare da ragi da yawa don hawa zoben fistan, kuma adadin zoben piston ya dogara da buƙatun hatimin, wanda ke da alaƙa da saurin injin da matsa lamba. Injuna masu sauri suna da ƙananan zobba fiye da ƙananan injuna, kuma injunan mai suna da ƙarancin zoben fiye da injunan diesel. Manyan injinan mai suna amfani da zoben gas 2 da zoben mai guda 1; Injin diesel yana da zoben gas guda 3 da zoben mai guda 1; Ingin dizal mai ƙarancin gudu yana amfani da zoben gas 3 ~ 4. Don rage raguwar raguwa, ya kamata a rage tsayin ɓangaren bel gwargwadon yiwuwar, kuma ya kamata a rage adadin zobe a ƙarƙashin yanayin tabbatar da hatimi.
Duk sassan zoben fistan da ke ƙasa da tsagi ana kiran su piston skirts. Matsayinsa shine jagorantar fistan a cikin silinda don maimaita motsi da jure matsi na gefe. Lokacin da injin ke aiki, saboda tasirin iskar gas a cikin silinda, piston zai lanƙwasa ya lalace. Bayan da fistan ya yi zafi, adadin faɗaɗa ya fi na sauran wurare saboda ƙarfe a fil ɗin piston. Bugu da ƙari, piston zai haifar da nakasar extrusion a ƙarƙashin aikin matsa lamba na gefe. Sakamakon nakasar da ke sama, sashin siket ɗin piston ya zama ellipse a cikin alkiblar dogayen axis daidai gwargwado zuwa fil ɗin piston. Bugu da ƙari, saboda rashin daidaituwa na rarraba zafin jiki da taro tare da axis na piston, haɓakar thermal na kowane sashe yana da girma a saman kuma ƙarami a ƙasa.
Babban gazawar taron piston da dalilansu sune kamar haka:
1. Ablation na saman saman piston. Ablation na fistan yana bayyana a saman fistan, tare da sako-sako da rami a lokuta masu haske da narkewar gida a lokuta masu nauyi. Babban dalilin cire saman piston yana faruwa ne ta hanyar ƙonewa mara kyau, ta yadda saman ya karɓi zafi mai yawa ko kuma yana gudana ƙarƙashin babban kaya bayan zoben piston ya makale kuma ya karye.
2, saman saman piston ya fashe. Hanyar da ke saman saman fistan gabaɗaya tana daidai da kullin rami na fistan, wanda galibi yakan haifar da tsagewar gajiyar da zafin zafi ke haifarwa. Dalili: aikin da injin ya yi yawa yana haifar da nakasar fistan fiye da kima, wanda ke haifar da fashe gajiya daga saman saman piston;
3, Piston zobe tsagi gefen bango lalacewa. Lokacin da piston ya motsa sama da ƙasa, zoben piston ya kamata ya zama telescopic radial tare da nakasar silinda, musamman ma zafin zafin zoben farko yana da girma, kuma yana shafar "tasiri" na iskar gas da man fetur, don haka rikicewar zobe da girgiza suna faruwa a cikin tsagi na zobe, haifar da lalacewa;
4. Zoben piston shine coke makale a cikin tsagi na zobe. Piston zobe coking sakamakon lubricating mai hadawan abu da iskar shaka jijiya ko zobe asarar 'yancin motsi a cikin tanki, wannan gazawar yana da illa sosai. Babban dalilai: injin dizal overheating ko aiki na dogon lokaci obalodi, don haka lubricating man danko, piston zobe, Silinda tsanani thermal nakasawa; Lubricating gurbataccen mai yana da tsanani, lubricating ingancin mai ba shi da kyau; Na'urar samun iska ta crankcase tana aiki mara kyau, yana haifar da matsananciyar matsananciyar matsananciyar matsananciyar matsananciyar matsananciyar matsananciyar iska ko rashin ƙarfi na silinda, yana haifar da saurin mai. Don haka, ya zama dole a tabbatar da amfani da ingantaccen mai don hana injin dizal yin zafi sosai.
Idan kana son ƙarin sani, ci gaba da karanta sauran labaran kan wannan rukunin yanar gizon!
Da fatan za a kira mu idan kuna buƙatar irin waɗannan samfuran.
Zhuo Meng Shanghai Auto Co., Ltd. ya jajirce don siyar da sassan motoci na MG&MAUXS maraba da siyarwa.
